Dirigible torpedo.



No. 767,490. PATENTED AUG. 16,1904.

' 1). w. MoGAUGHEY.

-DIRIGIBLE TORPEDO.

APPLICATION FILED MAR. 20, 1902. N0 MODEL.

2 SHBBTBSHEBT .1.

PATENTED AUG. 16; 1904 D. W. YMUGAUGHEY. DIRIGIBLE TORPEDO. APPLICATIONFILED MAR. 20, 1902- 2 SHEETS- SHEET 2 N0 MODEL.

iJNIrnn STATES Patented. August 16, 1904.

PATENT QFFICE.

DIRIGIBLE TORPEDO.

SPECIFICATION forming part of Letters Patent No. 767,490, dated August16, 1904.

Application filed March 20, 1902. Serial No. 99,115. (No model.)

To all whom it may concern: Be it known. that I, DAVID WILEY Mo-OAUGHEY, a citizen of the United States, re-- siding at Chicago, in thecounty of Cook and State of Illinois, have invented certain new anduseful Improvements in Di rigible Torpedoes, of which the following is aspecification.

This invention relates to that class of torpedoes which is provided withself-contained mechanism by which the movements thereof may becontrolled, and particularly to that class of torpedoes which isarranged to be controlled-that is, moved through the water in anydesired direction by electrically-actu ated mechanisms, all of whichwilllmore fully hereinafter appear. I

The principal object of the invention is to provide a simple,economical, and efiicient ture of which is attached directly to theshaft i electrically-controlled torpedo.

.A further object of the invention is to provide a torpedo withelectrically-actuated mech. anisms connected with the shore-line withbut a single insulated wire and arranged and con.-

structed in such a manner as .to be operated, directed, and, controlledfrom the shore by means of the electric current passing through saidwire. w

' The invention consists,further and finally, in the features,combinations, and details of construction hereinafter described andclaimed. In the accompanying drawings, Figure 1 is a diagrammatic viewshowing my improved controlling devices as they appear when-used inconnection with the torpedo. Fig. 2' is a plan sectional view of oneform of torpedo as it appears when constructed in accordance with theseimprovements. Fig. 3 is a side elevation, I partly in section, of thesame; and Fig. 4: is an enlarged sectional detail of the upper part ofspool-holding'rod shown in the lower part of Fig. 3, as will be morefully hereinafter explained. Fig. 5 is a diagrammatic illustration ofthe reversible motor whichis used to turnthe rudder. a

In theart to which this inventionrc'lates it is well known that it ishighly desirable to provide a means by which anexplosive torpedo may belaunched from the shore or from a vessel'and directed toward a givenmark and exploded by contact therewith or at any desired point adjacentthereto. To accomplish this result, various devices and expedients havebeen used, some of which give more or less satisfaction and all of whichcontain objections which render their use somewhat undesirable. Thisinvention, therefore, is designed principally to overcome as manyobjections of the prior art as possible and provide asimple, economical,and eflicient torpedo, which may be controlled from the shore by the useof a.

single conducting-line which conveys currents of various intensities tothe mechanism and is arranged to operate. the desired mechanism, andthereby direct and control the movements of the torpedo, as will behereinafter more fully explained. I

In Fig. 1, A is an electric motor, the arma- 8 of the propeller. (SeeFigs. 2 and 3.) B is an electric motorwhose armature is attached to theshaft 2, (see Fig. 2,) upon which there is aworm which operates in aworm-wheel 3, Fig, 2, thereby operating shaft 4 and worm 5. Worm 5 worksin worm-wheel 6, Fig. 2, which is attached to rudder post 27.

Electric motor manner'that the direction of the motion of its armaturedepends upon the direction of the current-that is to say, if a directcurrent will cause "its armature to' revolve from left to right then aninverse current will cause its armature to revolve from right to left.tric motor A is constructed in such a manner that its armature willrevolve in the samedirection no matter whether-a direct or inversecurrent is used. It is apparent, therefore, that when an electriccurrent passes through Eleo-' the motor A the propeller 1 will alwaysro-' tate in the same direction tha t is, so as to propel the torpedoforward. It is also apparent that the rudder 85, Fig. 3, will swingeither to theright or the left, its motion depending upon the directionof the current which passes through motor B.

I will now describe the mechanism by means of which the motor B, whichcontrols the working of the-rudder, can be out into or out of thecircuit at the will of the operator, the opera- B Is constructed in sucha battery or a dynamo, located on shore.

tor thus being enabled to control the direction ner with its forwardmotion. I

In Fig. 1, C is an automatically-operated switch, which, with the motorsA and B, is I located in the torpedo. This switch 0 is composed of anumber of segments which are alternately conductors and non-conductorsand which are arranged, as shown in the diagram, 1 in two concentriccircles. The conductingsegments of the outer circle are 9, 10, 11, and12. The. conducting-segments. of the inner circle are 13, 14, 15, and16. The switch has 1 the conducting-arm and brush 17 extending from apivot 18 at its center and which connects successively with the segmentsabove enumerated and which is operated by a ratchet 81, which is movedin a step-by-step manner bymeans of an armature-lever 19, which isarranged in such a manner as to be operated by the magnet D when D isenergized. Around the outer edge of the switch (1 are two concentricconductors 2O and-21. 20 has metallic connection with the outerconducting-segments 9, 10, 11, and 12 through wires 22, 23, 24, and 25,respectively. Conductor 21 has metallic connection, as shown in thediagram, with the conducting-segments of the inner circle 13, 14, 15,and 16, respectively, through the wires 26, 27, 28, and 29,respectively. The conducting-segments of the outer circle areconstructed in such a manner that no radius drawn from the center ofpivot 18 to any part of any of said conducting-segments 9, 10, 11, and12 can pass through or touch any part of said segments 13, 14, 15, or16, and no radius drawn from the center of said pivot 18 to any part ofsaid conducting-segments 13, 14, 15, and 16 can pass through any part ofsaid segments 9, 10, 11, and 12.

.E is an indicator located on the shore and used solely to enable theoperator to know the position of the switch arm or brush 17. Ratchet 30corresponds with ratchet 81 of the switch above described. Ratchet 30 isoperated by armature-lever 80, which is arranged adjacent to andoperated by magnet F. Arm 32 corresponds to arm 17 of the switch, andthe relative positions of 32 and 17 are always the same. The segments ofthe indicator correspond with the segments of the switch, the segments33, 35, 37, and 39 corresponding with the segments 13, 14, 15, and 16 ofthe switclr and the segments 34, 36, 38, and 40 of themdicatorcorresponding with segments 1O, 11, 12, and 9 of the switch.

G is a source of electrical power, either a of the torpedo withoutinterfering in any man- H is a key for making and breaking the circuit.I is a switch for reversing the current. E, F, G, H, and I are locatedon the shore. l A, B, C, and I) are located in the torpedo. I will nowdescribe the method of operating l the above mechanism. 1 l

The current starts from the battery G, passes through Wire 4 to magnetF, energizing it,

thence through wire 42 to switch-arm 43, thence to button 44, thencethrough wire 45 to magnet D, which it energizes, thence to wire 46 tothe pivot 18, thence through switch-arm and brush 17 to switch-segment13, thence through wire 26 to conductor 21, thence through wire 47 tomotor B, thence through wire 48 to motor A, thence through Wire 49 tothe water at 50, and thence through the water and land to 51, thence bywire 52 to button 53, thence by arm 54 and wire 55 to key H, thencethrough wire 56 back to-the battery.

WVhen the current flows in the direction as above described, the motorsA and B areboth operated. Motor A will propel the torpedo forward, Whilemotor B will move the rudder 8. (See Figs. 2 and 3.)

The motor B is constructed in such a manner that if a direct currentwill cause its armature to revolve from the left to right an inversecurrent will cause its armature to revolve from right to left. Theoperator is thus enabled by means of the switch I to use either a director an inverse current, and thereby turn the rudder either to the left orto the right, as desired.

' Ichoose to call the current above described a direct current, and inthis description we will suppose that the direct current afie'cts themotor in such a manner as to turn its armature in such a direction thatthe rudder 8 is turned to the left and the inverse current will act toturn the rudder 8 to the right. Let us suppose that the mechanismremains exactly in the position shown in Fig. 1, except switch I, whichwe will suppose to be .in such position that its arm 54 is in contactwith button 57 of the switch and the arm 43 is in contact with button 53of the switch. The current will then flow through the motors A and B in'an opposite direction--that is to say, the current will leave thebattery G by wire 4, pass through magnet F, wire 42, arm 43, button 53,wire 52 to the ground at 51, thence through the ground and water to 50,thence through wire 49, motor A, wire 48, motor B, wire 47, conductor21, wire 26, segment 13, switch-brush and arm 17, wire 46, magnet D,wire '45, wire 58 to button 57, thence through arm 54 and wire 55,

key H and wire 56 back to the battery. This current last described Ichoose to call an inverse current.

The mechanism is arranged in such a manner that when the current ispassing through the circuit, as represented in Fig. 1, the magnets D andF are energized, and the corresponding armature-levers'19 and 80 areattracted" to them, as represented in Fig. 1. When, however, the currentis broken, the magnets I) and F are deenergized, and the springs 59 and58 draw the corresponding armature-levers l9 and 80 away from D and E,

lIO

into contact, respectively,

respectively.

levers 19 and 80 turning upon their respective pivots S2 and 83 theratchets 81 and 30 are operated in a step-by-step manner by making andbreaking the circuit.

Now suppose the mechanism is in the same positionas represented in Fig.1 and the operator has moved the rudder to the desired position anddesires to cut the motor B out of the circuit,-so that the torpedomay-still be propelled forward without changing its direction. In orderto do this, the current is broken for an instant by pressing down thekey H. The armature-levers 19 and 80 being no longer attracted by themagnets D and F will be drawn down to their normal positions againststop-pins and 7 0. As soon as the current is allowed to flow, however,by removing the pressure from the key H the magnets D and F are againenergized and attract their respective armatures, and thereby operatingthe ratchets 81 and 30 in such a manner as to throw the arms 17 and 32around with segments 9 and 40. Supposing the switch I to be in theposition as shown in Fig. land the switchlever 17 to be in contact withsegment 9, the current will then flow from the battery G through wire 4,magnet F, wire 42, arm 43, button 44, wire 45, magnet 1)., wire 46,switcharm 17 to segment 9 of the switch, thence by wire 22 to conductor20, thence through wire 71 and wire 48 to motor A, thence through wire49 to the water at 50, thence through water and land to 51, thencethrough wire 52, button 53, arm 54, wire 55, key H, and wire 56 backtothe battery. It will therefore be seen that when the switch-lever 17 isin contact with segments 9, 10, 11, or 12 ofthe switch the current willflow through the motor A, but will not flow through the motor B, and itwill also 'be seen that when switch-arm 17 is in contact with segments13, 14, 15, and 16 of. the switch the current will flow through both ofthe motors A and B. Inasmuch as the position of the arm 32 alwayscorresponds with the position of the switch-lever 17, the operator isenabled at all times to tell whether one or both of the motors are inoperation and ,which direction the rudder is being turned. By use of theswitch I and key H the operator is enabled to use at will either motor Aalone or motors A and'B together and either a direct or inverse current,and is thereby enabled to turn the torpedo either to right or leftwithout interfering with its forward motion.

In order that the flow of current may not be interrupted while theswitch-brush 17 is passing from one segment of the switch to another,the switch-brush 17 is made so broad that in passing from one segment toanother- (for 1nstance,'from segment 13 to segment 22) therewill beaninstant of time when it will be in contact with-two segments, during,

In consequence of armaturealways pass The switchwhich time the currentwill through both motors A and B.

brush is made so narrow, it is at rest, as represented in the drawings,Fig. 1, it will never be in contact with more than oneconducting-segment, so that the switch-brush can be brought to rest insuch a position as to cause the current to pass through either one orboth of the motors at the will of the operator.

To provide means for holding the electric conducting-wire, which may betaken as wire 45 of the drawings, I meter to put the spool K, containingthe shown in Fig. 3. Near the end of the wire, as at 71, Fig. 4, saidspool is connected, by means of a button 72, with the brush 73, and fromthence the current passes to the motors, so that as the torpedo is movedout there will be little or no drag of Wire. The spool K is workedeither upon a pointed pivot or ballbearings, so as to cause as littlefriction as possible and should be inclosed in a funnellike apartment84, Figs. 2 and 3, with an opening at 74 suflicient to allowthe Wire 45to pass, which opening should be well back toward the stern of thetorpedo in order to facilitate the unwinding of the spool KL It may beplaced on. the land and the wire be paid out automatically as thetorpedo is directed or controlled.

Reversible motors are well known in common use. In Fig. 5', however, I,have illustrated diagrammatically a reversible motor mechanism,including a'switch 130, such asI employ and which may be said toconstitute a portion of such motor mechanism.

I will now describe the manner of revers: ing the motion of thearmatureof the motor B. (See Fig. 1.)

In Fig. 5, B is a of motor B, as Fig. 1, and which is used to turn therudder in the desired direction, as here'inbefore described. s

In Fig. 5, 100 is a soft-iron wire-wound magnet, and 101 is apermanently-magnetized portion of a pivoted armature-bar 102 ener gizedand'placed adjacent tosuch magnet in such a manner that the pole nearestthe magdiagrammatic illustration magnet is energized by a directcurrent.

When the parts are in the position shown in Fig. 5, with electriccurrent flowing from battery G through wire 47, (see Fig. 1,) thencearound magnet 100, energizing. same, armature 101 will be attracted anddrawn down into contact with in Fig. 5. I The current will then flowfrom magnet 100 through wire 104;thence through pivoted armature-bar 102to contact-post 105 l and through the same; thence throughcontact-spring 106; thence through wire 107 and i around field-magnet108, energizing it; thence same, in the torpedo, as

should be understood, however, that the spool magnet 100, as shownvhowever, that when described in connection with net will'be attractedthereby whenever the 11 1, contact-spring 112, post 113, post 1145,

i spring 115, wire: 116 to land around armature describedgf The armatureand field magnets of motor ,rectione that j the rudder to :said motorBHNowit' it 's; i :left to right peia or I switch (366 Fig. 1,). SG'

, l currentwill now flow thr opposite direction to that I hence wiilfiowarouii l; j z =rectionzas to cause it'to repel 'ar 3 j untilarmaturebarl willbe in centactwitli spring 119,122. and 1 I g respectiveil, 113',and'11st ands n tively; will be broken;

, and 5,; thence around. armatur 'Inagnets117, ei iergizing same thencethrcuigh wire 48 to: motor A, and thence through wire, i

battery G, as herembefo're t9 and back to l fence through wirecontactwlth springs 122 and 125.

B are wound in Such a manner as to cause at .mature-magnets ll'i'torevolve in a given diin such a; direction as to cause turn from right toleft when Q g tor B, (shown in Fig.1 1,) including the switch Imechanism is operated by a desired: t

direct; current.

into contact withbiii tton last described; fanc 7 0 1 00111 maturdbari I102 impinges against pin] magnets 11?,

energizing same, thence through :wire 116,'

Y 107, thence around held-magnet L108, EDGIg'IZ" ing'same, thencethrough wire 109, thence around magnet 110, energizing same, thencethrough wire 111 and 120 to spring 119, thence through post 118, bar122, Wire 104, around magnet 100, energizing same, as hereinbet'oredescribed, thence through wire 17 and back to the battery G in mannerhereinbct'ore described.

It will be seen that the inverse current passes around the armature 117in an opposite direction to, the direct current, the result being thatthe respective poles of the armaturemagnets 117 will be reversed withreversal'of current. It is also apparent that the direct current andinverse currents will flow around field-magnets 108 and 110 in the samedirection, and that. therefore the polarity of the field-magnets willremain the sa whether a direct or inverse current be used, theresultbeing that the direction of the motion of the armature 117 will bereversed when the direction of the actuation-currentis reversed, ashereinbefore suggested. Posts 105 and 118, Fig. 5, are so adjusted withreference to springs 106 and 119, respectively, 1hat while magnet 101 ismoving between nagnet 100 and pin 127, as hereinbeforc de scribed, thereis an instant of time when each )f said posts is in contact with itsrespective pring, and in like manner there is an instant If time whenposts 113 and 11% are in contact i 123 -fl 2. i

' l30,lisf used I in connection therewith,

hearmaturei of motorsA'willaiways ro whether or, inverse current isused, because i the actuating :currentffiowingj around its field I "andarmature magnets will I always be corre d simultaneously reversed, the

me, nomatter,

such adie see i gly an ire 1226, spring 1,25,, metalhca', connectedposts 124 and l I :spring'122, wire 1:21, wire l l l l with springs;112;

riods' of double: contact, however,

comes to rest, either by.

d ,115,= respectively, and

an instanutor when; movable armature-bar 1052 impin in up n p 1 1.27 orbymagnet101 impmgingagainst mag net 100, there, will be a; contactbetween the respective posts and of movable bar .102.

springs on. one side only, P0sts113 and 1:14 and posts l23 and 124:: areV respectively;

fromibar 102.

} eans ofwhich the. direction 3 T ZU Q n Fig; "5 I irate intent-edstissue at;

of, such motor: isreversed, and} whichswitehmechanismmaythereforebegsaidjg I 11Gb?) essentialpart of anjordinary reversi-- i 1 I bl 'rnojtormechanism t willbe understood, I I

p ,7 y I that this or an inowjn; form of; reversible motor T mechanismmay beemployed.

i trio meters aindno switch? ads-a ordinaryland well i and; switch 1 I jI j The is the ordinary type of eIec-E 2 E i I mechanismnsuch as j jTllBTQ- resultant efi'ec tflbeing the same as though'nei f Z I therhadbeen-reversed,

electromagnetic mechanism for operating such switch to supply current toone or both of such motors, substantially as described.

2. In a torpedo of the class described, the combination of propellingand rudder mechanism, electric motors for operating the same, a singleline-wire connecting the same With the land and with a source ofelectric energy, a stepby -step switch interposed between the motors andthe source of electric energy, and electromagnetic mechanism foroperatingsuch switch to supply current to one or both of such motors,substantially as described.

3. In a torpedo of the class described, the combination of propellingandrudder mechanism, a motor connected with the propelling mechanism, amotor connected 'with the rudder mechanism, a step-by-step switch connected with both such motors, a single linewire connecting such switchwith the shore and with a source of electric current, andelectromagnetic mechanism for operating such switch to supply current toone or both of such motors, substantially as described.

4. In a torpedo of the class described, the combination of propellingmechanism, rudder mechanism, a motor connected with the propellingmechanism, a motor, connectedwith the rudder mechanism, an electricconductingwire connecting both of such motors together,

a 'step-by-step switch electrically connected with such motors in seriesand between the same,

' with'the shore and with the source of electric current, and means foroperating such switch to make and break the electric 'circuit and supplycurrent to one orboth of such motric conducting-wire connecting allyconnected with both of such motors,

tors, substantially as described.

5. In a torpedo of combination of propelling mechan1sm,'ruddermechanism, an electric motor connected with the propelling mechanism, anelectric motor nected with such motors in series and with thepropeller-motor alone, a single line-wire-connecting such step by stepswitch with the shore and with a sourceofel'ectric current, and

electromagnetic mechanisms for operating the step-by-step switch to makeand break the circuit so as to supply current to both of such motors orto the propeller-motor alone, substantially as described.

6. In a torpedo of the class described, the

combination 9f propelling mechanism, rudder mechanism, an electric motorconnected with the propelling mechanism, an electric motor connectedwith the rudder mechanism, electric conducting-wires connecting both ofsuch motors together, step-by-step switch electi'id e ectromagneticmechanism for operating the step-by-step switch,

a single line-wire electrically connecting the step-by-step switch withthe shore and with a source of currentsupply, and a key for making andbreaking such circuit to energize and deenergize the electromagneticmechanism and cause the operation of the stepby-step switch, substan'tially as described.

7 In a torpedo of the class described, the combination of propellingmechanism, rudder mechanism, an ele'ctromotor for such propellingmechanism, an electric motor for such rudder mechanism, a step-by-stepswitch elec-' trically connected with both of such motors in series andwith the propelling-motor alone, electromagnetic mechanism for operatingsuch step-by-step switch, a single line-wire connecting suchelectromagnetic mechanisms with the shore and with a source of electriccurrent, a key for making and breaking such main line to energize anddeenergize the magnets and cause the operation of the parts, and a dummyswitch or indicator on the shore set synchronously with the switch onthe torpedo and electrically connected with the main line and operatedby the making and breaking of the circuit therein, substantially asdescribed.

8. In a torpedo of the class described, the

a single line-wire connectingsuch switch I the class described, the

combination of propeller mechanism, rudder mechanism, an electric motorconnected with the propeller mechanism arranged to run in one directionwithout regard to the direction of the current-supply, a motor connectedwith the rudder mechanism. arranged to be reversed with the direction ofcurrent-supply, a stepby-st'ep switch electrically connecting sue motorstogether in series and connected with the propeller alone,electromagnetic mechanisms for operating the stepby-step switch, asingle line-wire connecting the electromag 'netic mechanisms andstep-bystep switch with the shore, a key or similar element forma-kingand breaking the main line, and a reversingswitch in such main lineintermediate the l source of current-supply and the step-by-step switchto change the direction of the current, i substantially as described. a

9. In a torpedo of the class described, the combination of propellermechanism, rudder l mechanism, an electric motor connected with 1 thepropeller mechanism arranged to run in I one direction without regard tothe direction of the current-supply, a motor connected with l the ruddermechanism arranged to be reversed with the direction of current-supply,a stepby-step switch electrically connecting such motors together inseries and connected with the propeller motor alone, electromagneticmechanisms for operating the step-by -step switch, a single line-wireconnecting the electromagnetic mechanisms and step-by-step switch withthe shore, a'key or similar element for making and breaking the mainline, a reversing-switch in such main line interme diate the source ofcurrent-supply and the step-by-step switch to change the direction ofthe current, a dummy indicating-switch on the shore, and electromagneticmechanisms for operating the same connected with the main line andarranged to be' operated as the circuit is made or broken therein,substantially as described.

10. In a torpedo of the class described,the combination of a propellermechanism, rudder mechanism, an electric motor connected with thepropeller mechanism arranged to run constantly in one direction andwithout regard to the direction of current-supply, a second motorconnected with the rudder mechanism arranged to be rotated and reversedas the direction of current-supply is changed, a stepby-stcp switchprovided with two concentric sets of conducting-segments one set of suchsegments electrically connected with and connecting both of such motorsin series'and the other set of segments electrically connected with thepropelling-motor alone, a switch-lever arranged to pass over suchsegments and i be alternately and electrically connected witl aconducting-segment first in one set and ther in the other,electromagnetic mechanisms to] rotating such switch-lover in astep-by-stey l manner, a single line-wire connecting sucl electromagnetsand the step-by-step switch lever with the shore and with a source ofcurrent-supply, a key for'making and breaking the circuit in such lineand energizing and deenergizing the electromagnetic mechanism tooperate'the same, and a reversing-switch in such main line intermediatethe electromagnetic mechanisms and the source of currentsupply to changethe direction of the current, substantially as described.

11. In a torpedo of the class described, the combination of propellermechanism, rudder mechanism, an electric motor connected with thepropeller mechanism arranged to run constantly in one direction andWithout regard to the direction of current-supply, a second motorconnected with the rudder mechanism arranged to be rotated and reversedas the direction of current-s11 pply is changed, a stepby-step switchprovided with two concentric sets of cond uctin'gsegments-one set ofsuch segments electrically connected with and connecting both of suchmotors in series and the other set of segments electrically connectedwith the propelling-motor alone, a switch-lever arranged to pass oversuch segments and be alternately and electrically connected with aconducting-segment first in one electromagnetic mechanisms for rotatingsuch switch-lever in a step-by-step manner, a single line-wireconnecting such electromagnets and the step-by-step switch-lever withthe sliore and with a source of current-supply, a key for making andbreaking the circuit in such line and energizing and denergizing theelectromagnetic mechanism to operate the same, a reversing-switch insuch main line intermediate the electromagnetic mechanisms and thesource of current-supply to change the'direction of the current, a dummyindicating step-by-step switch, electromagnetic mechanisms for operatingthe same connected with the main line and arranged to be energized anddeenergized by the making and breaking of the circuit therein,substantially;

is described.-

12. In a torpedo of the class described, the :ombination of propellingmechanism, rudder set and then in the other, I

I mechanism, an electric motor connected'with j the propelling mechanismarranged to rotate i in one direction without regard to the direction ofcurrent-supply, a second electric motor connected with the ruddermechanism and arranged to have its rotation reversed as the directionofcurrent is reversed, a stepby-step switch provided with two concentriccirclesofswitchsegmentsalternatelyopposed, the conducting-segments inone circle being arranged opposite the spaces formed between thesegments in the other circle, means electrically connecting theconducting switch-segments in one circle with both of motors, meanselectrically connecting the con ducting switch-segments in the'othcrcircle with the propelling-motor alone, a rotatable switch-leverarranged to contact the cond ucting switch segments in each circlealternatelyfirst a conducting-segment in one circle and then aconducting-segment in the other circleand be out of electric contactwith the switch-segments in the opposed circle, ratchetand-pawlmechanism for operating the switchlever in a step-by-step manner,electromagnetic mechanisms for operating the pawl-andratchet mechanism,a single line of wire connecting the electromagnetic mechanisms and thestep-by-step' switch mechanism with the shore and a source ofcurrent-supply, a key "for making and breaking the circuit in suchsingle, main line, a reversin -switch intermediate the source ofcurrent-supply and the electric motors for changing the direction ofcurrent in the main line, a dummy indicating.- switch provided with anindicating lever-arm arranged to be operated in a step-by-step manner,pawland-ratchet mechanism for opl crating the same, a secondelectromagnetic device for operating the pawl-and-ratchet mechanism ofthe dummy and meanselectrically connecting the second electromagneticdevice with the main line so that it may be operated as the circuitismade indicator-switch,

and broken therein, substantially as described.

DAVID \VILEY MOCAUGHEY. Witnesses:

THOMAS F. SHERIDAN, HARRY IRWIN URoMna.

the electric

